Study of Corrosion Behavior of MgO-Cr2O3 Refractories under the Influence of Cement Clinker

The MgO-Cr2O3 refractories are amongst the most important refractory materials that are used in rotary furnaces in the cement production line. In this research, the corrosion behavior of these refractories was studies under the influence of clinker. A number of refractory samples with clinker were first heated at 1450C for 3 hours. The sample's cross section were then examined. The XRD technique was used for the phase analysis and the scanning electron microscope (SEM) equipped with the EDX facility was employed for the microstructural analysis. The results showed that the chemical composition (the amounts of oxides) was changed in the brick's surface layers when the MgO-Cr2O3 refractory material with the clinker was heated. In addition, the detrimental effect of clinker on the MgO-Cr2O3 refractories was attributed to the diffusion of the liquid phases through the grain boundaries and the pores which were present in their surface layers.